Reassigning to selinux-policy.
selinux enable in enforcing mode:
dlm_controld executed from cman init script does not start.
clustat cannot connect to rgmanager (socket issue mostlikely).
selinux disable, everything works as expected.
I cross checked with our QE people and they do test with selinux enabled.
We suspect a recent update to -policy might have gone wrong.

I own the box that we saw this problem on. I expect we could easily restore it to the problem-producing state, and then I could give you developers access to it.
If that would be interesting / desirable please let me know.